Dr. Dennis Hartlieb is a graduate of the University of Michigan School of Dentistry. He maintains a full time practice, Chicago Beautiful Smiles, in the Chicago suburb of Glenview, Illinois. Dr. Hartlieb is an instructor at the Center for Esthetic Excellence in Chicago and is an Adjunct Associate Professor at the Marquette University School of Dentistry in Milwaukee, Wisconsin. He lectures extensively to dentists throughout the US on the art and science of anterior and posterior direct resin techniques. Dr. Hartlieb is an Accredited Member of the American Academy of Cosmetic Dentistry. He is also a member of the prestigious American Academy of Restorative Dentistry, and the American Dental Association. He is the president of the Chicago Academy of Interdisciplinary Dentofacial Therapy, and officer for the Chicago Academy of Dental Research study club. His dentistry has been seen in many dental publications and he has contributed articles on his techniques in restorative dentistry.